US 12,113,234 B2
Cover assembly of secondary battery and secondary battery
Shiyao Zhang, Ningde (CN); Quankun Li, Ningde (CN); Peng Wang, Ningde (CN); Zhanyu Sun, Ningde (CN); Siying Huang, Ningde (CN); and Jinmei Xu, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on Feb. 21, 2023, as Appl. No. 18/172,036.
Application 18/172,036 is a continuation of application No. 16/941,419, filed on Jul. 28, 2020, granted, now 11,637,348.
Claims priority of application No. 201910726079.9 (CN), filed on Aug. 7, 2019.
Prior Publication US 2023/0198087 A1, Jun. 22, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 50/342 (2021.01); H01M 10/04 (2006.01); H01M 50/147 (2021.01); H01M 50/20 (2021.01); H01M 50/543 (2021.01); H01M 50/578 (2021.01)
CPC H01M 50/342 (2021.01) [H01M 10/0413 (2013.01); H01M 50/147 (2021.01); H01M 50/20 (2021.01); H01M 50/543 (2021.01); H01M 50/578 (2021.01); H01M 2200/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A cover assembly of a secondary battery, comprising:
a cover plate comprising a gas vent;
a gas exhaust valve configured to seal the gas vent and deform in response to an increase in temperature to get out of a state of sealing the gas vent in such a manner that gas inside a case of the secondary battery is directly exhausted to an exterior of the secondary battery via only the gas vent; and
a sealing part arranged between the gas exhaust valve and the cover plate and surrounding the gas vent for sealing a gap between the gas exhaust valve and the cover plate;
wherein:
the gas exhaust valve comprises a metal sheet and a fixing part, and the metal sheet seals the gas vent;
the sealing part is arranged between the metal sheet and the cover plate for sealing a gap between the metal sheet and the cover plate;
the fixing part is connected to the metal sheet, and the metal sheet is fixed to the cover plate by the fixing part; and
the fixing part is configured to deform in response to an increase in temperature in such a manner that the metal sheet gets out of the state of sealing the gas vent.